fix(frontend) : ERP-26 - fix Hydra response format (member not hydra:member) and IRI permissions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/modules/core/pages/admin/roles.vue

@@ -111,7 +111,7 @@ interface Role {
     label: string
     description: string | null
     isSystem: boolean
-    permissions: Permission[]
+    permissions: (Permission | string)[]
 }
 
 const { t } = useI18n()
@@ -132,12 +132,12 @@ const deleting = ref(false)
 async function loadRoles() {
     loading.value = true
     try {
-        const data = await api.get<{ 'hydra:member': Role[] }>(
+        const data = await api.get<{ member: Role[] }>(
             '/roles',
             {},
             { toast: false },
         )
-        roles.value = data['hydra:member']
+        roles.value = data.member
     } finally {
         loading.value = false
     }